This functionality will only be available for signed system applications.
A disable call will cause a file descriptor to the input device
driver to be closed, which in turn may cause the input device
to switch into a low-power mode.
An enable call will reopen the input device.
Bug: 30143923
Test: developed a custom apk with signature permission that
calls disable/enable on touchscreen device. Verified that
touchscreen stops working when disable is called and starts
working again when enable is called. Verified that the file
handle to the driver is closed and reopened. Verified that
the notification onInputDeviceChanged is received in the app.
CTS test - android.view.cts.InputDeviceEnabledTest
Change-Id: Ia352deb548b73559f821afd586893393d39a0696
04ef4dcac2